Sonifex RB-DA6-G Redbox (x2)

6 Way Stereo Distribution Amplifier With Output Gain Control.


The RB-DA6-G Redbox was purchased new in May 2014 and was used in a professional broadcast environment from June 2014 until November 2017.  The units have remained in storage since that date. They are in near perfect condition as can be seen from the pictures below.

The units are sold as seen (either individually or together) and we confirm they are both in full working order and in very good condition.

There are currently 2 units in stock. 

Original Purchase Price: £619 sterling excluding VAT (approximately € 780.00)

Current Price (New): €670 approx.

Guide Price: €  450.00 (excluding VAT)

Current Location: Nicosia – Cyprus

Please Note: The following pictures were taken in May 2022.

The RB-DA6G is a 1U rack-mount high performance 6 way stereo distribution amplifier for splitting a source into a number of different outputs. It is identical to the RB-DA6 with the addition of individual output gain adjustment, instead of global stereo gain adjustment.

RB-DA6G Diagram

RB-DA6G Block Diagram.


Technical Specification For RB-DA6G

Audio Specification

Maximum Input Level: +28dBu
Maximum Output Level: +28dBu
Frequency Response: 20Hz to 20kHz ±0.1dB (600Ω load, ref 1kHz)
Gain Range: Adjustable 8dB loss to 18dB gain (12 adjustable pots)
Common Mode Rejection: >66dB typically
Input impedance: >20kΩ bridging
Output impedance: <50Ω
Distortion: 0.01% THD @ 1kHz, ref +8dBu output
Noise: -88dB unity gain, ref +8dBu output


Inputs: 2 x XLR 3 pin female (balanced, can be unbalanced)
Outputs: 12 x XLR 3 pin male (balanced, can be unbalanced)
Mains Input: Filtered IEC, switchable 110-120V, or 220-240V, fused, 6W max
Fuse Rating: Anti-surge fuse 100mA 20 x 5mm (230VAC)
Anti-surge fuse 250mA 20 x 5mm (115VAC)

Equipment Type

RB-DA6G: 6 way stereo distribution amplifier with output gain control

Physical Specification

Dimensions (Raw): 48cm (W) x 10.8cm (D) x 4.2cm (H) (1U)
19” (W) x 4.3” (D) x 1.7” (H) (1U)
Dimensions (Boxed): 58.5cm (W) x 22.5cm (D) x 7cm (H)
23” (W) x 8.9” (D) x 2.8” (H)
Weight: Nett: 1.3kg  Gross: 1.9kg
Nett: 2.9lbs Gross: 4.2lbs